Whirl spray nozzle



y 9, 1956 F. w. WAHLIN 2,747,936

WHIRL SPRAY NOZZLE Filed Nov. 17, 1955 IN V EN TOR.

United States Patent wnuu. SPRAY, NOZZLE Fred W. Wahlin, Kane County, Ill., assignor to Spraying Systems Co., Bellwood, 111., 'a corporation of Illinois Application November 17, 1953, Serial .No. 392,645

4 Claims. (Cl. 299-114) My invention relates to spray-nozzles of the type having vanes therein by which the liquid supplied to the nozzle discharge orifice has a whirling movement imparted thereto .so as to produce an umbrella shaped spray, the invention having reference more particularly to the shape and construction of such vanes.

Heretofore the vanes of such nozzles have generally been provided by constructing them as a separate part which was inserted in the chamber or passage of the nozzle between the entrance to the nozzle and the spray discharge orifice therefrom. Moreover, previous nozzles of this type did not provide the desired volume and Uniformity of spray discharge nor the desired symmetry of spray pattern.

The principal objects of the present invention are to provide vanes which may be made as an integral part of the nozzle body; to increase the volume of the spray dis charge; to insure greater uniformity of distribution of spray and symmetry of spray pattern; and in general, to simplify and improve the nozzle and the performance thereof, these and other objects being accomplished as pointed out more particularly hereinafter and as shown in the accompanying drawing, in which:

Fig. 1 is a rear or entrance end view of a nozzle made in accordance with the present invention;

Fig. 2 is a side view of the nozzle;

Fig. 3 is a longitudinal sectional view of the nozzle taken on the line 33 of Fig. l, and line 3-3 of Fig. 4; and

Fig. 4 is a longitudinal sectional view taken on the line 44 of Fig. 3.

As shown in the drawing, the nozzle comprises a body having a substantially cylindrical chamber 11 therein with a circular opening 12 leading therefrom at one end through which the spray is discharged from the nozzle. Preferably the body 19 is externally of substantially cylindrical shape, as shown, with external threads 13 at the entrance end thereof for securing the nozzle to a pipe or other facilities through which liquid is supplied to the nozzle, and is provided with c-ircumferentially spaced longitudinal ribs 14 for wrench engagement therewith.

With in the cylindrical chamber 11 are two vanes 15 and 16, each of a somewhat semicircular shape and located at the opposite sides respectively of the chamber 11. These vanes extend inwardly to a central longitudinal plane of the chamber 11 along which the section of Fig. 3 is taken and each vane is disposed in crosswise relation to the other and oppositely inclined with respect thereto, as shown in Fig. 3, so that each vane imparts to the body of liquid flowing through the chamber 11 rotation in the same circumferential direction.

These vanes 15 and 16 are preferably interconnected at the place of crossing, as indicated at 17, and each has in the inner edge thereof at the side of the crossing place 17 nearest the discharge opening 12 a large rectangular notch, the depth of which is such that it extends quite near to the circumferential wall of the chamber 11. Said notch of the vane 15 is indicated at 18 and said notch of the vane 16 is indicated at 19.

Each vane 15 and '16 extends to the entrance end of the nozzle where a'somewhat quadrant shaped flange, but of less than quadrant area, overlies that end of the respective vane and partially closes off the entrance to the chamber 11, the said flange at the entrance end of the vane 15 beingindicated at .20 and the said flange at the entrance end of the vane 16 being indicated at 21.

Each said flange 20 and 21 extends inwardly to the aforesaid central longitudinal plane along-which :the section of Fig. '3 is taken and to which the vanes 15 and 16 extend inwardly from the oppositesides of the chamber 11 and accordingly each flange 20 and 21 extends in that direction half waya-oross the entrance to :the chamber 11. .In the direction paralleling said plane, however, each flange 20 .and 21 extends "less than half way across the entrance to the chamber 11, as shown particularly in Figs. 1 and 2, the expanse of the flanges 20 and 21 in this latter direction being sufficient to extend slightly beyond and overhang the chamber entranceend of the respective vane 15 and 16 as indicated respectively at 22 and23 in Fig. 3.

Immediately underneath each of the chamber entrance obstructing flanges 20 and21, each respective vane 15 and 16 has a small rectangular shaped notch in the inner edge thereof, said small notch of the vane 15 being indicated at 24 and the small notch of the vane 16 being indicated at 25, and it will be noted, particularly in Fig. 3, that whereas the large notches 18 and 19 extend perpendiculalrly or approximately perpendicularly through the respective vane, the small notches 2'4 and 25 do not extend perpendicularly through the respective vane but instead they extend therethrough in a direction paralleling the flanges 20 and 21 and perpendicular to the direction of flow of liquid into the chamber 11 of the nozzle.

H-eretofore, with nozzles of the type to which the present invention relates, the umbrella shaped spray produced thereby generally was not symmetrical or truly circular but instead was elongated to a somewhat oval shape in a diametrical direction, and, moreover, the volume of spray discharge was undesirably limited.

With the present nozzle construction the oval spread of spray pattern is avoided and true circularity thereof is assured together with uniformity of spray distribution. Moreover, with the present nozzle the volume of discharge is approximately fifty percent greater than in previous nozzles of internal vaned type.

Furthermore, the present nozzle may be readily made in a one piece unitary form by employing a destmctible core of the interior shape of the nozzle chamber 11 in a nozzle mold which parts at the central longitudinal plane of the nozzle along which the section of Fig. 3 is taken. All portions of the vanes 15 and 16 and of the flanges 20 and 21, as Well as the opposite sides of the notches 18, 19, 24 and 25, extend in a direction directly inward toward said central plane and accordingly are readily adapted for the making of such destructible core for such one piece molding operation by merely employing a core mold which is shaped at these places with suitable taper or draw and parts at the above mentioned central longitudinal plane as is well known in the molding art.

While I have shown and described my invention in a preferred form, I am aware that various changes may be made without departing from the principles of the invention, the scope of which is to be determined by the following claims.

What is claimed is:

1. A molded one-piece spray nozzle comprising a body which has a chamber therein extending from end to end thereof and defined by a surrounding annular wall, the said chamber having an entrance at one end and a spray discharge orifice at the other end of substantially less area than the entrance and defined by an inwardly extending portion of the surrounding wall, the said annular wall being formed at the inner side with a pair of flat web portions thereon which are located at the opposite sides respectively of and project edgewise toward a chamber bisecting axial plane and are oppositely inclined in crosswise relation to one another to provide deflecting vanes which obstruct the path of flow through the chamber and impart a whirling movement around the longitudinal axis of the chamber .to material flowing through the chamber from the entrance to the discharge orifice thereof, the said chamber being substantially cylindrical at the place where the said webs are located therein and having a substantially semi-cylindrical portion thereof at each side of said bisec-ting plane and the said web portions being located respectively in the said substantially cylindrical portions with each web portion of a generally semicircular form corresponding to the transverse area of the substantially semi-cylindrical portion in which it is located and each said web portion extending obliquely along the portion of the annular wall which defines the outer side of the substantially semi-cylindrical portion in which it is located and projecting inwardly from said wall portion directly toward the said bisecting plane and having its opposite side faces lying in planes converging relatively to one another toward said bisecting plane.

2. A spray nozzle in accordance with claim 1 and wherein each web portion is joined directly to the other web portion solely at the place where it crosses .the other web portion.

3. A spray nozzle in accordance with claim 1 and wherein each web portion has a pair of openings there through at the opposite sides respectively of the place where it crosses the other web portion and at least one of the said openings of each web portion leading therethrough in a direction corresponding to the direction in which the other web portion is inclined.

4. A spray nozzle in accordance with claim 1 and wherein the annular wall has two baffies projecting in- Wardly therefrom at opposite sides respectively of the chamber and partially obstructing the entrance thereto and each said web portion has an opening therethrough and located between a respective one of said baflies and the spray discharge end of the chamber.

References Cited in the file of this patent UNITED STATES PATENTS 1,282,175 Binks Oct. 22, 1918 1,324,579 Binks Dec. 9, 1919 1,794,013 Groen Feb. 24, 1931 2,305,210 Wahlin Dec. 15, 1942 2,647,799 Kinney Aug. 4, 1953 

